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Qetten tatto atmt @ffice CHARLES It. GIBSON,- OF MADISON, INDIANA. Letters Patent No. 64,658, detect May 14, 1867.

IMPROVED BENCH-VISE.

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'IO ALL WHOM I'I MAY CONCERN:

Bo it known that I, CHARLES R. GIBSON, of Madison, in the county of Jeerson, and State of Indiana, have invented a new and'useful Improvement in Be1iel1Vise; and I do hereby dec-lare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being-had to the accompanying drawings, forming part 'of thiss'peciiication.

This invention relates toa method by which the vise is made to adjust itself to the shape of the article put into it, whether such article be square or tapering; and the invention consists in making the vise-screw in two parts and connecting them together by a universal joint, and also in making the front jaw in two parts, thereby allowing the upper portion of thejaw to tur-n on a pivot and adjust itself to the article, as will be hereinafter described.

Figure l represents avertical section of the-vise as attached to a bench.

Figure 2 shows a cross-section of the visethrough the line a: :c of Iig. I.

Figure 3 is a top view ot' the vise, showing the jaws griping a tapering piece.

Similar letters of reference indicate like par-ts.

A is the front jaw of the vise; A', thc back jaw. B is the screw proper. O shows the head or lever end ot" the screw. l) is the joint coupling. E is the nut of the screw. F is the lower or pivotcd end of the front jaw A. The inner ends of the two parts et' the screw, B and C, terminate in small globes or balls, both of which enter a short piece of uvtnbe, D, which couples them together by pins, which pass through the coupling end through the balls, as seen in the drawing. These pins stand at right angles with eachother, and eachiball turns on its pivot or pin, making what is called a universal joint, and allowing the'jaw A to stand at an angle with its fellow jaw, as seen in fig. To allow otl this niet-ionl the jaw A turns on its lower portion F. G is a block through which the lower end of the jaw passes, and which forms a portion of the ff are straps irlnly attached to the back jaw A on each sidcfbetween which the block or socket "r is secured. It is held in its place by screws 7L t, which are pivots upon which it turns when the jaw is extended or is moved backl and forth. There is a collar on the front jaw at g, which rests upon the socket-block G. J is a washer attached to the bottom end of A by a screw, Ic is a tapering pin, which is inserted through the socket G and the pivot ot' the jaw A when it is desired that the faces of the two jaws'shall stand parallel. When this pin is inserted, as seen in the drawing, thejaw works as in the ordinary vise'. L represents the bench to which the vise is attached.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the jaws A and A with the universal-jointed vise-screws B C D and nut F, all constructed and arranged substantially as described. I

2. The combination of the jaws A A', the stirrupff, block G, and pin K, all constructed and combined as set forth.

CHARLES R. GIBSON.

Witnesses:

WILLIAM Il. BRUNING, JAMES H. GIBSON. 

